proxy2.lua

local base64     = require "ngx.base64"
local httpc = require("resty.http").new()
local ngx_print           = ngx.print

local base64_encode = base64.encode_base64url
local proxy_opts = {}

-- remove below 2 lines if not using proxy auth
local auth_header = "Basic " .. base64_encode("holosix:xN186VaYjrCGepJI")
proxy_opts.http_proxy_authorization = auth_header

-- substitute with your proxy address and port
proxy_opts.http_proxy = "http://squid.kong-dp.svc.cluster.local:3128"


local ok, err = httpc:connect {    
    scheme = "http",
    host = "httpbin.kong-dp.svc.cluster.local", -- the service you want to call
    port = 8000,
    proxy_opts = proxy_opts,
    ssl_verify = false,
}

if not ok then
  ngx.log(ngx.ERR, "failed to connect to proxy: ", err)
  return
end

local res, err = httpc:request({
    method  = "GET",
    path    = "/uuid", -- the path of the service
})

if not res then
    ngx.log(ngx.ERR, "request failed: ", err)
    return
end

local status = res.status
local length = res.headers["Content-Length"]

local reader = res.body_reader

repeat
    local chunk, ok, read_err, print_err

    chunk, read_err = reader()
    if read_err then
      ngx.log(ngx.ERR, read_err)
    end

    if chunk then
      ok, print_err = ngx_print(chunk)
      if not ok then
        ngx.log(ngx.ERR, print_err)
      end
    end
    ngx.log(ngx.ERR,"body:", chunk)
    if read_err or print_err then
      break
    end
until not chunk

ngx.log(ngx.ERR, "length: ", length)
ngx.log(ngx.ERR, "status: ", status)